Title:
FREE PISTON ENGINES WITH SINGLE HYDRAULIC PISTON ACTUATOR AND METHODS
Document Type and Number:
WIPO Patent Application WO/2012/177795
Kind Code:
A3
Abstract:
Free piston engines having a free piston having a first piston diameter in a cylinder with a combustion chamber on a first side of the first piston and a piston rod having a second diameter fastened to a second side of the first piston and extending to a single second piston having a third diameter smaller than the first diameter, but larger that the second diameter, the single second piston extending into a hydraulic cylinder, the second piston having a first hydraulic area defined by the third diameter in a first hydraulic chamber, and a second hydraulic area defined by the area between the third diameter and the second diameter in a second hydraulic chamber, and valving to control the coupling of a high pressure, a low pressure and a reservoir to the first and second hydraulic chambers to control the top and bottom dead center positions and velocity of the free piston.
Inventors:
STURMAN ODED EDDIE (US)
Application Number:
PCT/US2012/043393
Publication Date:
April 04, 2013
Filing Date:
June 20, 2012
Export Citation:
Assignee:
STURMAN DIGITAL SYSTEMS LLC (US)
STURMAN ODED EDDIE (US)
STURMAN ODED EDDIE (US)
International Classes:
F02B71/04; F01B11/00; F04B35/00
Domestic Patent References:
| WO2008014399A2 | 2008-01-31 |
Foreign References:
| US20110083643A1 | 2011-04-14 | |||
| US20090250035A1 | 2009-10-08 | |||
| US20020076339A1 | 2002-06-20 | |||
| US5647734A | 1997-07-15 |
Attorney, Agent or Firm:
VINCENT, Lester, J. et al. (Sokoloff Taylor & Zafman LLP,1279 Oakmead Parkwa, Sunnyvale CA, US)
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